Some like to walk around the edge of the rock on the ground. others climb to the top, though some people do not think they should do so. they believe that climbing destroys the beauty of the rock. they also argue that it should be kept off limits to protect the ancient paintings in its caves.

which sentence best introduces the passage?

a.
the great continent of australia is vast with many amazing sites for people to enjoy.
b.
climbing was against the wishes of some groups because they considered the rock important.
c.
many people travel to australia each year to witness the wonder of the rock called uluru.
d.
however, the government realized that people were doing great harm to the massive rock.